SPEC Kit 354: Data Curation (May 2017)
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95 SPEC Kit 354: Data Curation UNIVERSITY OF NOTRE DAME, HESBURGH LIBRARIES CurateND Data Curation Infrastructure CurateND Data Curation Infrastructure CurateND uses a Hydra-based discovery application. It uses Fedora Commons 3.x as the object registry and metadata store and Apache Solr as an index. Using both Fedora and Solr is common for Hydra applications. Self-deposit items go through the Hydra application. There is also a batch ingest ability, which deposits items directly into the preservation store as well as Fedora. Objects in Fedora contain pointers to our preservation store. The preservation store is a custom application that puts content into BagIt bags for storage on tape; maintains a disk cache of content; provides a URL for each preserved file; and runs fixity checks on the content. The data is ultimately all stored on tape, with two copies kept locally and two remotely. The tape appliance handles the replication. Digital Librarians can deal with the batch ingest directly via a networked filesystem. Content is staged on the filesystem, where it can also be reviewed, assessed, and described. When it is ready, the librarian can start an ingest, which copies the data into the preservation system, the metadata into the preservation system, and a copy of the metadata into Fedora. It then asks the Hydra application to index the new content.